=====Cisco DMVPN Phase 1 and 2 with EIGRP=====
====Notes====
===NHRP Hub configuration:===
  - Create a tunnel interface on bos1
    - <code>interface Tunnel0
  ip address 172.30.30.1 255.255.255.0</code>
  - Add private network to routing protocol.
    - <code>router eigrp 30
  network 172.30.30.0</code>
  - Identify NHRP network-id (like an OSPF area 0).
    - <code>interface Tunnel0
  ip nhrp network-id 30</code>
  - Allow multicast traffic to traverse DMVPN infrastructure.
    - <code>interface Tunnel0
  ip nhrp map multicast dynamic</code>
  - Add a tunnel source.
    - <code>interface Tunnel0
  tunnel source GigabitEthernet0/2</code>
  -  Tunnel source is the IP to connect to the NHRP network-id 30.
    -  Aka: the public facing interface.
  - Define mode to operate tunnel in.
    - <code>interface Tunnel0
  tunnel mode gre multipoint</code>
  - Tunnel will come up.
  - Now spokes can be added.
  • NHRP Spoke configuration:
  - Create a tunnel interface on tpa1
    - <code>interface Tunnel0
  ip address 172.30.30.2 255.255.255.0</code>
  - Add private network to routing protocol.
    - <code>router eigrp 30
  network 172.30.30.0</code>
  - Define NHRP network-id.
    - <code>interface Tunnel0
  ip nhrp network-id 30</code>
  - Define tunnel address of the NHRP server (hub).
    - <code>interface Tunnel0
  ip nhrp nhs 172.30.30.1</code>
  - Map NHRP server address to publicly reachable IP.
    - <code>interface Tunnel0
  ip nhrp map 172.30.30.1 10.0.30.1</code>
  - Send all multicast traffic to the public IP only.
    - <code>interface Tunnel0
  ip nhrp map multicast 10.0.30.1</code>
  - Add a tunnel source
    - <code>interface Tunnel0
  tunnel source GigabitEthernet0/2</code>
      - Tunnel source is the IP to connect to the NHRP network-id 30.
      - Aka: the public facing interface.
  - Define mode to operate tunnel in.
    - <code>interface Tunnel0
  tunnel mode gre multipoint</code>
  - Tunnel will come up.
  - Repeat NHRP Spoke configuration on each spoke
  - To verify:
    - <code>show ip eigrp nei</code>
      - Shows neighborship of NHRP Hub at 172.30.30.1.
    - <code>show ip route eigrp</code>
      - Shows that EIGRP has learned additional routes through the tunnel interface.
    - <code>traceroute {IP of spoke}</code>
      - Can see hops a packet takes to reach a destination.
  - To allow spoke to spoke communication with EIGRP, split horizon needs to be disabled on the NHRP Hub.
    - <code>interface Tunnel0
    no ip split-horizon eigrp 30</code>
  - Now the spokes go through the hub to reach another spoke.
  - This behavior can be modified to allow spoke to spoke communication without going through the hub.
===DMPVN Phase 2===
  - Configure hub
    - <code>interface Tunnel0
  no ip next-hop-self eigrp 30</code>
  - Now packets will flow spoke to spoke without using the hub as a next hop. This creates a dynamic spoke to spoke Phase 2 tunnel and allows a more efficient way for spokes to communicate with each other.
====Topology====
{{:cisco:dmvpn:dmvpn_lab_base_topology.png?900|}}
====Device Configurations====
  * pe1
    * ++Config|<code>hostname pe1
no ip domain lookup
!
interface Loopback0
 ip address 192.168.0.1 255.255.255.255
!
interface GigabitEthernet0/0
 description mgmt-sw-1;g0/0
 ip address 10.255.0.1 255.255.0.0
 no shutdown
!
interface GigabitEthernet0/1
 description ny1;site-1;10.0.0.2/30;g0/1
 ip address 10.0.0.1 255.255.255.252
 no shutdown
!
interface GigabitEthernet0/2
 description co1;site-2;10.0.0.6/30;g0/1
 ip address 10.0.0.5 255.255.255.252
 no shutdown
!
interface GigabitEthernet0/3
 description ga1;site-3;10.0.0.10/30;g0/1
 ip address 10.0.0.9 255.255.255.252
 no shutdown
!
interface GigabitEthernet0/4
 description tn1;site-4;10.0.0.14/30;g0/1
 ip address 10.0.0.13 255.255.255.252
 no shutdown
!
interface GigabitEthernet0/5
 description tx1;site-5;10.0.0.18/30;g0/1
 ip address 10.0.0.17 255.255.255.252
 no shutdown
!
router ospf 1
 network 10.0.0.1 0.0.0.0 area 0
 network 10.0.0.5 0.0.0.0 area 0
 network 10.0.0.9 0.0.0.0 area 0
 network 10.0.0.13 0.0.0.0 area 0
 network 10.0.0.17 0.0.0.0 area 0
!
line con 0
 exec-timeout 0 0
 logging synchronous
 end
!
wr</code> ++
  * ny1
    * ++Config|<code>hostname ny1
no ip domain lookup
!
interface Loopback0
 ip address 192.168.1.1 255.255.255.255
!
interface GigabitEthernet0/0
 description mgmt-sw-1;g0/1
 ip address 10.255.1.1 255.255.0.0
 no shutdown
!
interface GigabitEthernet0/1
 description pe1;10.0.0.1/30;g0/1
 ip address 10.0.0.2 255.255.255.252
 no shutdown
!
interface GigabitEthernet0/2
 description ny2;10.0.1.2/30;g0/1
 ip address 10.0.1.1 255.255.255.252
 no shutdown
!
router eigrp 30
 network 10.0.1.1 0.0.0.0
 network 192.168.1.1 0.0.0.0
!
router ospf 1
 network 10.0.0.2 0.0.0.0 area 0
!
line con 0
 exec-timeout 0 0
 logging synchronous
 end
!
wr</code> ++
  * ny2
    * ++Config|<code>hostname ny2
no ip domain lookup
!
interface Loopback0
 ip address 192.168.1.2 255.255.255.255
!
interface GigabitEthernet0/0
 description mgmt-sw-1;g0/3
 ip address 10.255.1.2 255.255.0.0
 no shutdown
!
interface GigabitEthernet0/1
 description ny1;10.0.1.1/30;g0/2
 ip address 10.0.1.2 255.255.255.252
 no shutdown
!
router eigrp 30
 network 10.0.1.2 0.0.0.0
 network 192.168.1.2 0.0.0.0
!
line con 0
 exec-timeout 0 0
 logging synchronous
 end
!
wr</code> ++
  * co1
    * ++Config|<code>hostname co1
no ip domain lookup
!
interface Loopback0
 ip address 192.168.2.1 255.255.255.255
!
interface GigabitEthernet0/0
 description mgmt-sw-2;g0/0
 ip address 10.255.2.1 255.255.0.0
 no shutdown
!
interface GigabitEthernet0/1
 description pa1;10.0.0.5/30;g0/2
 ip address 10.0.0.6 255.255.255.252
 no shutdown
!
interface GigabitEthernet0/2
 description co2;10.0.2.2/30;g0/1
 ip address 10.0.2.1 255.255.255.252
 no shutdown
!
router eigrp 30
 network 10.0.2.1 0.0.0.0
 network 192.168.2.1 0.0.0.0
!
router ospf 1
 network 10.0.0.6 0.0.0.0 area 0
!
line con 0
 exec-timeout 0 0
 logging synchronous
 end
!
wr</code> ++
  * co2
    * ++Config|<code>hostname co2
no ip domain lookup
!
interface Loopback0
 ip address 192.168.2.2 255.255.255.255
!
interface GigabitEthernet0/0
 description mgmt-sw-2;g0/3
 ip address 10.255.2.2 255.255.0.0
 no shutdown
!
interface GigabitEthernet0/1
 description co1;10.0.2.1/30;g0/2
 ip address 10.0.2.2 255.255.255.252
 no shutdown
!
router eigrp 30
 network 10.0.2.2 0.0.0.0
 network 192.168.2.2 0.0.0.0
!
line con 0
 exec-timeout 0 0
 logging synchronous
 end
!
wr</code> ++
  * ga1
    * ++Config|<code>hostname ga1
no ip domain lookup
!
interface Loopback0
 ip address 192.168.3.1 255.255.255.255
!
interface GigabitEthernet0/0
 description mgmt-sw-2;g0/1
 ip address 10.255.3.1 255.255.0.0
 no shutdown
!
interface GigabitEthernet0/1
 description pe1;10.0.0.9/30;g0/3
 ip address 10.0.0.10 255.255.255.252
 no shutdown
!
interface GigabitEthernet0/2
 description ga2;10.0.3.2/30;g0/1
 ip address 10.0.3.1 255.255.255.252
 no shutdown
!
router eigrp 30
 network 10.0.3.1 0.0.0.0
 network 192.168.3.1 0.0.0.0
!
router ospf 1
 network 10.0.0.10 0.0.0.0 area 0
!
line con 0
 exec-timeout 0 0
 logging synchronous
 end
!
wr</code> ++
  * ga2
    * ++Config|<code>hostname ga2
no ip domain lookup
!
interface Loopback0
 ip address 192.168.3.2 255.255.255.255
!
interface GigabitEthernet0/0
 description mgmt-sw-2;g1/0
 ip address 10.255.3.2 255.255.0.0
 no shutdown
!
interface GigabitEthernet0/1
 description ga1;10.0.3.1/30;g0/2
 ip address 10.0.3.2 255.255.255.252
 no shutdown
!
router eigrp 30
 network 10.0.3.2 0.0.0.0
 network 192.168.3.2 0.0.0.0
!
line con 0
 exec-timeout 0 0
 logging synchronous
 end
!
wr</code> ++
  * tn1
    * ++Config|<code>hostname tn1
no ip domain lookup
!
interface Loopback0
 ip address 192.168.4.1 255.255.255.255
!
interface GigabitEthernet0/0
 description mgmt-sw-2;g0/2
 ip address 10.255.4.1 255.255.0.0
 no shutdown
!
interface GigabitEthernet0/1
 description pe1;10.0.0.13/30;g0/4
 ip address 10.0.0.14 255.255.255.252
 no shutdown
!
interface GigabitEthernet0/2
 description tn2;10.0.4.2/30;g0/1
 ip address 10.0.4.1 255.255.255.252
 no shutdown
!
router eigrp 30
 network 10.0.4.1 0.0.0.0
 network 192.168.4.1 0.0.0.0
!
router ospf 1
 network 10.0.0.14 0.0.0.0 area 0
!
line con 0
 exec-timeout 0 0
 logging synchronous
 end
!
wr</code> ++
  * tn2
    * ++Config|<code>hostname tn2
no ip domain lookup
!
interface Loopback0
 ip address 192.168.4.2 255.255.255.255
!
interface GigabitEthernet0/0
 description mgmt-sw-2;g1/1
 ip address 10.255.4.2 255.255.0.0
 no shutdown
!
interface GigabitEthernet0/1
 description tn1;10.0.4.1/30;g0/2
 ip address 10.0.4.2 255.255.255.252
 no shutdown
!
router eigrp 30
 network 10.0.4.2 0.0.0.0
 network 192.168.4.2 0.0.0.0
!
line con 0
 exec-timeout 0 0
 logging synchronous
 end
!
wr</code> ++
  * tx1
    * ++Config|<code>hostname tx1
no ip domain lookup
!
interface Loopback0
 ip address 192.168.5.1 255.255.255.255
!
interface GigabitEthernet0/0
 description mgmt-sw-1;g0/2
 ip address 10.255.5.1 255.255.0.0
 no shutdown
!
interface GigabitEthernet0/1
 description pe1;10.0.0.17/30;g0/5
 ip address 10.0.0.18 255.255.255.252
 no shutdown
!
interface GigabitEthernet0/2
 description tx2;10.0.5.2/30;g0/1
 ip address 10.0.5.1 255.255.255.252
 no shutdown
!
router eigrp 30
 network 10.0.5.1 0.0.0.0
 network 192.168.5.1 0.0.0.0
!
router ospf 1
 network 10.0.0.18 0.0.0.0 area 0
!
line con 0
 exec-timeout 0 0
 logging synchronous
 end
!
wr</code> ++
  * tx2
    * ++Config|<code>hostname tx2
no ip domain lookup
!
interface Loopback0
 ip address 192.168.5.2 255.255.255.255
!
interface GigabitEthernet0/0
 description mgmt-sw-1;g1/0
 ip address 10.255.5.2 255.255.0.0
 no shutdown
!
interface GigabitEthernet0/1
 description tx1;10.0.5.1/30;g0/2
 ip address 10.0.5.2 255.255.255.252
 no shutdown
!
router eigrp 30
 network 10.0.5.2 0.0.0.0
 network 192.168.5.2 0.0.0.0
!
line con 0
 exec-timeout 0 0
 logging synchronous
 end
!
wr</code> ++